Problems with Infinity Prelude MTS mid-range

Yes, am having issues me-self.

I have a couple of the midrange drivers that are experiencing the buzzing you're referring to. Not sure if the voice coils have actually collapsed or if it's due to the peeling.

I was fortunate to have purchased quite a few replacement drivers and just take care of it myself. I know it's not from clipping or under driving my Preludes. I went with tons of clean power to prevent that from happening. I believe it to be a defect in the drivers.

Now I'm getting some really nice humming coming out of my subs. When you first turn them on they're fine. But, as soon as you send a signal to them... up comes the hum. Very annoying. Anyone else having this issue? Where did you send your Preludes to be repaired?

I was told to take them to a local electronics shop by Harmon. Don't know about you's but, here in WY, I'm not sure anyone would even know who/what Infinity is. Let me park my sheep first and then I'll take a look at your High-End Bose speaker-er!

I could repair the problem if I were able to have someone diagnose and tell me exactly which part's at fault. Use to build pc boards and can replace any and all electronics but I have no expertise on troubleshooting circuits.

Still love the sound reproduction from my Preludes. Running full range front and rears with the Prelude MTS for the Center Channel. Used to have a surround setup with Legacy's Focus and there's no comparison. I was really hesitant on powered subs but these have made me a true believer. Now if I could jut get rid of that annoying humming.

Hmmm,

Skip

There is an authorized repair shop here in California, not far from me. I will see if he can give us some answers and post them here.

Still hoping one of you folks at Infinity will get in on the discussion. You are welcome anytime. I might like to point out that your competition checks in from time to time with some helpful answers.

I've had problems with the sub amps (have 6 prelude subs & 3 intermezzo subs,very similar amps) All but 2 have had the amps stop working, & one has hum issue. Repair shops have no incentive to repair, as reimbursement for warranty work is very low. I've rewired & using crown amps with a velodyne sms-1 to power/eq (also a few velodyne sc 1250's power amps)

I also have a problem with a distorting midrange when playing certain CDs (for instance Louis Armstrong, his voice sounds awful, and some rock CDs).
I have been playing them pretty as probably the former owner also did.
No problem with the subs, although they sound not as powerful as they should be, but maybe i am expecting too much.
A rep from Harmon said one could press on the cone lightly and listen for scraping sound, then press some more back and forth and the sound would get better for a while at least. I have not tried it. He didn't mention why the problem was there, but hinted at overdriving.
I don't know what to do, the info here makes me feel I might as well buy a new set of speakers (and keep the subs).
Any tips are welcomed! (I live in Europe.) The speakers sound really good when on a lot of material (jazz, classical).

According to this page, the 3.5 inch driver is no longer available!

http://www.harmanaudio.com/search_browse/partlist.asp?BrandId=INF&MarketId=HOM&Parts=PMTS-TOWER

What to do? Does anyone know of a similar speaker if one would try to replace it?